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Geometry Final Vocab
Vocab... for the geometry final
24
Mathematics
8th Grade
06/14/2011

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Term
An angle with a measure less than 90
Definition
Acute angle
Term
The segment perpindicular to a base of a triangle from the opposite vertex.
Definition
Altitude
Term
Formed from two rays with the same endpoints called the vertex
Definition
Angle
Term
The ray that divides an angle into two congruent, adjacent angles
Definition
Angle bisector
Term
The set of points on a plane that are a given distance froma given point
Definition
circle
Term
Points in one line
Definition
Collinear Points
Term
Two angles whose measures add up to 90
Definition
Complementary angles
Term
Figures that have the same size and shape
Definition
Congruent Figures
Term
using reasoning from accepted postulates, thereoms, definitions, and givin info to prove something
Definition
Deductive reasoning
Term
A polygon whose vertices all lie on a circle
Definition
Inscribed polygon
Term
A triangle with at least two sides congruent
Definition
Isosceles Triangle
Term
A segment from a vertex to the midpoint of the opposite side.
Definition
Median of a Triangle
Term
An angle whose measure is greater than 90 and less than 180
Definition
Obtuse Angle
Term
Coplaner lines that never intersect
Definition
Parallel lines
Term
A line that intersects a segment at its midpoint and makes a right angle
Definition
Perpendicular Bisector
Term
Formed by coplaner sides so that each segment intersects exactly 2 segments,, no two segments are collinear
Definition
Polygon
Term
A statement that is accepted without proof.
Definition
Postulate
Term
A four sided polygon
Definition
Quadrilateral
Term
A polygon that is both equilateral and equangular
Definition
Regulay Polygon
Term
An angle with a measure exactly 90
Definition
Right angle
Term
A region bound by two radii and an arc of the circle
Definition
Sector of a circle
Term
Two angles that add up to 180
Definition
Supplementary angles
Term
A statement that can be proved
Definition
Theorem
Term
Two angles whose sides form two opposite rays
Definition
Vertical angles
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